There is no batch invoicing in qbo like they had in desktop.  Your only option is to create them and make them recurring, schedule them.

Resolution for 'create similar issue: 'How can I best create similar invoices for around 200 customers twice a year?' available: Yes.

The create similar issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the create similar issue yourself by looking for a resolution described in the article. If it is a complex create similar issue or you are unable to solve the issue, you may contact us by clicking here or by using other create similar support options.

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